Need some advice!

So me and my boyfriend d have been together almost 2.5 years. We’ve been through a lot. Him going to basic for 4 months, going off to college which is only 45 min away but still, and other personal things. I love him to death and we try and plan of lives around each other. We’re still young but know that we’re meant to be together. I’m asking this question for people who’ve been in a long relationship. Lately I’ve been like “it’s my senior year, I want to just live my life and meet all kinds of people” but then when I’m with my boyfriend I’m dead set on being with him forever. He’s 2 grades ahead of me so when we hangout with my friends it’s like he doesn’t know any of them or doesn’t like them because I’ve dated one of them before, so it just gives off bad vibes. Idk why I’m getting this feeling. Maybe it’s just bc I’m a senior this year and don’t want to miss out on fun or anything but idk. I hate thinking it because I love him to death!!! Ugh, has this happened to any of y’all?